Josh 11:10-13

10Joshua turned back at that time, and took Hazor, and struck its king down with the sword. Before that time Hazor was the head of all those kingdoms.11And they put to the sword all who were in it, utterly destroying them; there was no one left who breathed, and he burned Hazor with fire.12And all the towns of those kings, and all their kings, Joshua took, and struck them with the edge of the sword, utterly destroying them, as Moses the servant of the Lord had commanded.13But Israel burned none of the towns that stood on mounds except Hazor, which Joshua did burn.